Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69e643c6ecc96c05b607516fd335d54811621a08bb9288443e7b39717ca42e42' 
  AND token = 'oZd/AlR4+a7lQ5WeMTSjv7pJo24IjQmr/m6Y5ufhOvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}